... buffer solution from 3 to 8 with intervals of for each new set of petri dishes. I will also use pH 9.2 buffer, as it is available and would allow more results to draw my conclusion from. As well as testing the effect of buffers, I am going to do an experiment using water as well. Seeds need water, correct illumination, suitable temperatures and the presence of oxygen to grow. All of these factors have been taken into account, and have been made provision for in my plan: pH is the changing variable in my experiment, and the seeds will receive natural lighting and room temperatures throughout the experiment. Oxygen will be constantly available as the petri dish lids are unsealed and will be removed daily to allow oxygen refreshment. To measure the effect of pH on germination, I will take percentages of seeds that have germinated (produced external shoots), and I will also ...

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